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"Unstructural biology" of alpha-synuclein, an intrinsically disordered protein related to the pathogenesis of Parkinson's disease

Research Project

Project/Area Number 20H03232
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 43040:Biophysics-related
Research InstitutionNational Institutes for Quantum Science and Technology

Principal Investigator

Fujiwara Satoru  国立研究開発法人量子科学技術研究開発機構, 量子生命科学研究所, 専門業務員 (10354888)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2023: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2020: ¥10,790,000 (Direct Cost: ¥8,300,000、Indirect Cost: ¥2,490,000)
Keywordsシヌクレイン / 天然変性蛋白質 / 蛋白質重水素化 / 中性子散乱 / パーキンソン病 / X線小角散乱
Outline of Research at the Start

α-シヌクレイン(αSyn)と呼ばれる蛋白質の線維状異常凝集体(アミロイド線維)形成は、パーキンソン病発症と密接に関連する。本研究では、αSynのアミロイド線維形成の分子機構解明を目指して、中性子散乱の新しい測定・解析法を開発し、天然変性蛋白質であるαSyn単量体のふるまいの詳細な特徴づけ、即ち、構造分布の導出、そしてその分布を生み出す蛋白質の分子内運動の定量的評価という、いわばαSynの「非構造生物学」を構築する。アミロイド線維のなりやすさが異なる様々な条件での解析結果を比較することで、線維化のカギとなるふるまいを特定し、線維化の分子機構解明への手掛かりを得る。

Outline of Final Research Achievements

Formation of abnormal filamentous aggregates (amyloid fibrils) of the protein, α-synuclein (αSyn), which is an intrinsically disordered protein (IDP), is closely related to the pathogenesis of Parkinson's disease. To elucidate how amyloid fibrils of αSyn form, the behavior of the αSyn monomers is investigated using small-angle neutron scattering and quasielastic neutron scattering. In particular, a new method, by which the detailed characterization of the structural distribution and the dynamical behavior of the IDPs such as αSyn is possible, is developed. This new method, utilizing the protein-deuteration techniques, is applied to various deuterated αSyn under various conditions, showing distinct propensity to fibril formation. The results obtained demonstrate the feasibility of the method, and provide the clues to specify the key behavior of αSyn leading to fibril formation.

Academic Significance and Societal Importance of the Research Achievements

本研究で開発された新しい解析法により、パーキンソン病発症に深く関係するαSynのアミロイド線維形成開始のカギとなるふるまいが特定された。これはαSynのアミロイド線維形成機構解明に向けた重要な手掛かりとなり、将来のパーキンソン病の予防・治療戦略策定に大きな貢献をなしうる重要な成果である。また、この解析法は、α-シヌクレインのみならず様々な蛋白質のアミロイド線維形成機構解明や変性状態の蛋白質の解析など、様々な展開へとつながる解析法であり、蛋白質科学の更なる発展に大きく貢献しうる方法である。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (7 results)

All 2023 2022 2021

All Journal Article (5 results) (of which Peer Reviewed: 4 results,  Open Access: 2 results) Presentation (2 results)

  • [Journal Article] Resveratrol Derivatives Inhibit Transthyretin Fibrillization: Structural Insights into the Interactions between Resveratrol Derivatives and Transthyretin2023

    • Author(s)
      Yokoyama Takeshi、Kusaka Katsuhiro、Mizuguchi Mineyuki、Nabeshima Yuko、Fujiwara Satoru
    • Journal Title

      Journal of Medicinal Chemistry

      Volume: 66 Issue: 22 Pages: 15511-15523

    • DOI

      10.1021/acs.jmedchem.3c01698

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Dynamical Behavior of Disordered Regions in Disease-Related Proteins Revealed by Quasielastic Neutron Scattering2022

    • Author(s)
      Fujiwara Satoru
    • Journal Title

      Medicina

      Volume: 58 Issue: 6 Pages: 795-795

    • DOI

      10.3390/medicina58060795

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Protonation states of hen egg-white lysozyme observed using D/H contrast neutron crystallography2022

    • Author(s)
      Chatake Toshiyuki、Tanaka Ichiro、Kusaka Katsuhiro、Fujiwara Satoru
    • Journal Title

      Acta Crystallographica Section D Structural Biology

      Volume: 78 Issue: 6 Pages: 770-778

    • DOI

      10.1107/s2059798322004521

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Cross-scale analysis of temperature compensation in the cyanobacterial circadian clock system2022

    • Author(s)
      Furuike Yoshihiko、Ouyang Dongyan、Tominaga Taiki、Matsuo Tatsuhito、Mukaiyama Atsushi、Kawakita Yukinobu、Fujiwara Satoru、Akiyama Shuji
    • Journal Title

      Communications Physics

      Volume: 5 Issue: 1 Pages: 75-75

    • DOI

      10.1038/s42005-022-00852-z

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] パーキンソン病関連蛋白質 α -シヌクレインの「非構造生物学」 構築2021

    • Author(s)
      藤原悟
    • Journal Title

      月刊「細胞」

      Volume: 8月号 Pages: 70-73

    • NAID

      40022675994

    • Related Report
      2021 Annual Research Report
  • [Presentation] Internal dynamics of α-synuclein revealed by quasielastic neutron scattering2023

    • Author(s)
      藤原悟、西久保開、富永大輝
    • Organizer
      第61回日本生物物理学会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Structural and dynamical properties of the disease-related mutants of α-synuclein2022

    • Author(s)
      藤原悟、西久保開、池中健作、Cesar Aguirre、望月秀樹
    • Organizer
      第60回生物物理学会年会
    • Related Report
      2022 Annual Research Report

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Published: 2020-04-28   Modified: 2025-01-30  

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